Must have

I used this in combo with my SRAM XX1 crankset to make a super slick 1x10 setup on my Santa Cruz Highball. This derailleur is a must because it removes chatter and shifts on a dime. Buy this, a XX1 crankset, an 11-speed chain and you have yourself a 1x10 setup that costs hundreds less than the dedicated SRAM XX1 1x11.

You can actually run 10 speed chains on the xx1 cranks to make the same setup. So really all you need is XX1 style chain ring, Type 2 derailer or even Shimano Shadow Plus and your golden! No chain drops!